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fix textarea newline handle (#32966) (#32977)

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Backport #32966 by metiftikci

Co-authored-by: metiftikci <metiftikci@hotmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
Giteabot 2024-12-25 13:10:14 +08:00 committed by GitHub
parent 90bd08ceef
commit 0e0ebf68d7
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GPG Key ID: B5690EEEBB952194
2 changed files with 20 additions and 5 deletions
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24
web_src/js/features/comp/EditorMarkdown.test.ts
View File

@ -4,13 +4,24 @@ test('EditorMarkdown', () => {
const textarea = document.createElement('textarea');
initTextareaMarkdown(textarea);
const testInput = (value, expected) => {
textarea.value = value;
textarea.setSelectionRange(value.length, value.length);
type ValueWithCursor = string | {
value: string;
pos: number;
}
const testInput = (input: ValueWithCursor, result: ValueWithCursor) => {
const intputValue = typeof input === 'string' ? input : input.value;
const inputPos = typeof input === 'string' ? intputValue.length : input.pos;
textarea.value = intputValue;
textarea.setSelectionRange(inputPos, inputPos);
const e = new KeyboardEvent('keydown', {key: 'Enter', cancelable: true});
textarea.dispatchEvent(e);
if (!e.defaultPrevented) textarea.value += '\n';
expect(textarea.value).toEqual(expected);
if (!e.defaultPrevented) textarea.value += '\n'; // simulate default behavior
const expectedValue = typeof result === 'string' ? result : result.value;
const expectedPos = typeof result === 'string' ? expectedValue.length : result.pos;
expect(textarea.value).toEqual(expectedValue);
expect(textarea.selectionStart).toEqual(expectedPos);
};
testInput('-', '-\n');
@ -18,8 +29,11 @@ test('EditorMarkdown', () => {
testInput('- ', '');
testInput('1. ', '');
testInput({value: '1. \n2. ', pos: 3}, {value: '\n2. ', pos: 0});
testInput('- x', '- x\n- ');
testInput('1. foo', '1. foo\n1. ');
testInput({value: '1. a\n2. b\n3. c', pos: 4}, {value: '1. a\n1. \n2. b\n3. c', pos: 8});
testInput('- [ ]', '- [ ]\n- ');
testInput('- [ ] foo', '- [ ] foo\n- [ ] ');
testInput('* [x] foo', '* [x] foo\n* [ ] ');

1
web_src/js/features/comp/EditorMarkdown.ts
View File

@ -92,6 +92,7 @@ function handleNewline(textarea: HTMLTextAreaElement, e: Event) {
if (!line) {
// clear current line if we only have i.e. '1. ' and the user presses enter again to finish creating a list
textarea.value = value.slice(0, lineStart) + value.slice(lineEnd);
textarea.setSelectionRange(selStart - prefix.length, selStart - prefix.length);
} else {
// start a new line with the same indention and prefix
let newPrefix = prefix;